The influence of merger and convection on an anticyclonic eddy trapped in a bowl
We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated at depth allows the ed...
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2021
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Online Access: | https://archimer.ifremer.fr/doc/00729/84080/91042.pdf https://doi.org/10.1016/j.ocemod.2021.101874 https://archimer.ifremer.fr/doc/00729/84080/ |
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ftarchimer:oai:archimer.ifremer.fr:84080 2023-05-15T17:08:17+02:00 The influence of merger and convection on an anticyclonic eddy trapped in a bowl De Marez, Charly Le Corre, Mathieu Gula, Jonathan 2021-11 application/pdf https://archimer.ifremer.fr/doc/00729/84080/91042.pdf https://doi.org/10.1016/j.ocemod.2021.101874 https://archimer.ifremer.fr/doc/00729/84080/ eng eng Elsevier Sci Ltd https://archimer.ifremer.fr/doc/00729/84080/91042.pdf doi:10.1016/j.ocemod.2021.101874 https://archimer.ifremer.fr/doc/00729/84080/ info:eu-repo/semantics/openAccess restricted use Ocean Modelling (1463-5003) (Elsevier Sci Ltd), 2021-11 , Vol. 167 , P. 101874 (12p.) Mesoscale Vortex Merger Convection text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1016/j.ocemod.2021.101874 2022-09-06T22:50:27Z We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated at depth allows the eddy to grow in size, and intensify at depth. Wintertime convection is also shown to directly intensify the eddy by deepening isopycnals. Also, convection indirectly affects the shape of the eddy. It enhances the number of merger (1) at the surface, with small vortices generated in the convectively-deepened surface mixed-layer, and (2) at depth, because the vertical distance between the main eddy's core and small companion vortices is reduced, thus increasing the merging efficiency. These processes altogether contribute to the maintaining of the eddy. On the other hand, the bottom drag is the main process contributing to the decay of the eddy. Our study thus shows that the sustaining for several years of such eddies trapped in a bowl is mainly due to the balance between merger and bottom drag. Article in Journal/Newspaper Lofoten Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Lofoten Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Ocean Modelling 167 101874 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Mesoscale Vortex Merger Convection |
spellingShingle |
Mesoscale Vortex Merger Convection De Marez, Charly Le Corre, Mathieu Gula, Jonathan The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
topic_facet |
Mesoscale Vortex Merger Convection |
description |
We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated at depth allows the eddy to grow in size, and intensify at depth. Wintertime convection is also shown to directly intensify the eddy by deepening isopycnals. Also, convection indirectly affects the shape of the eddy. It enhances the number of merger (1) at the surface, with small vortices generated in the convectively-deepened surface mixed-layer, and (2) at depth, because the vertical distance between the main eddy's core and small companion vortices is reduced, thus increasing the merging efficiency. These processes altogether contribute to the maintaining of the eddy. On the other hand, the bottom drag is the main process contributing to the decay of the eddy. Our study thus shows that the sustaining for several years of such eddies trapped in a bowl is mainly due to the balance between merger and bottom drag. |
format |
Article in Journal/Newspaper |
author |
De Marez, Charly Le Corre, Mathieu Gula, Jonathan |
author_facet |
De Marez, Charly Le Corre, Mathieu Gula, Jonathan |
author_sort |
De Marez, Charly |
title |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_short |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_full |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_fullStr |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_full_unstemmed |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_sort |
influence of merger and convection on an anticyclonic eddy trapped in a bowl |
publisher |
Elsevier Sci Ltd |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00729/84080/91042.pdf https://doi.org/10.1016/j.ocemod.2021.101874 https://archimer.ifremer.fr/doc/00729/84080/ |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Lofoten Rockall Trough |
geographic_facet |
Lofoten Rockall Trough |
genre |
Lofoten |
genre_facet |
Lofoten |
op_source |
Ocean Modelling (1463-5003) (Elsevier Sci Ltd), 2021-11 , Vol. 167 , P. 101874 (12p.) |
op_relation |
https://archimer.ifremer.fr/doc/00729/84080/91042.pdf doi:10.1016/j.ocemod.2021.101874 https://archimer.ifremer.fr/doc/00729/84080/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.ocemod.2021.101874 |
container_title |
Ocean Modelling |
container_volume |
167 |
container_start_page |
101874 |
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1766064013588824064 |